King Sombra returns to Equestria and he plans to get his revenge on the Princess of Friendship. However, unlike every other villain before him, Sombra has a plan...
A few years after Luna's return it seems that Equestria will finally know an era of peace and appears to be on the verge of a new renaissance. Ponies are happy. Luna is recovering. Celestia is miserable.
Princess Platinum is in mourning after the death of Clover, her faithful companion. Unable to tell others just how deep their bond really was, the noble mare contemplates how the ways she got her hooves dirty to defend that bond.
After years among the three pony tribes the Two Sisters fight their first great foe by themselves: King Sombra, the tyrant King of the Crystal Empire. Nothing goes as planned, everything, and everypony are not as they seem.